GB1057799A - Bimetallically controlled pneumatic thermostat - Google Patents

Bimetallically controlled pneumatic thermostat

Info

Publication number
GB1057799A
GB1057799A GB34224/65A GB3422465A GB1057799A GB 1057799 A GB1057799 A GB 1057799A GB 34224/65 A GB34224/65 A GB 34224/65A GB 3422465 A GB3422465 A GB 3422465A GB 1057799 A GB1057799 A GB 1057799A
Authority
GB
United Kingdom
Prior art keywords
lever
chamber
flapper
pressure
aug
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB34224/65A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robertshaw Controls Co
Original Assignee
Robertshaw Controls Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robertshaw Controls Co filed Critical Robertshaw Controls Co
Publication of GB1057799A publication Critical patent/GB1057799A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/185—Control of temperature with auxiliary non-electric power
    • G05D23/1854—Control of temperature with auxiliary non-electric power with bimetallic element
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/185—Control of temperature with auxiliary non-electric power
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2278—Pressure modulating relays or followers
    • Y10T137/2409—With counter-balancing pressure feedback to the modulating device

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Fluid Pressure (AREA)
  • Thermally Actuated Switches (AREA)
  • Temperature-Responsive Valves (AREA)

Abstract

1,057,799. Fluid-pressure servomotor systems. ROBERTSHAW CONTROLS CO. Aug. 10, 1965 [Aug. 11, 1964 No. 34224/65. Heading G3P. In a pneumatic thermostat, a fall in the ambient temperature causes a bi-metal flapper 68 to seat against a nozzle 62, supplied via restriction 18 from a supply chamber PS, thereby causing the pressure in a chamber PP to rise and lift a diaphragm 20 to rotate a lever 42 about its pivot 52, such rotation unseating a valve 34 to admit supply pressure to a chamber PB communicating at 30 with a device for varying the ambient temperature. The increased pressure in chamber PB is communicated to a chamber PF where it acts via diaphragm 26, lever 78 and spring 86 to provide a feedback to the flapper. If the pressure in chamber PP decreases, the accompanying clockwise rotation of lever 42 unseats a valve 40 to vent chamber PB. The flapper is pivoted at 71 and a cam 76 is rotatable to vary the set point temperature via a pin 72 and lever 70. In the practical embodiment of Figs. 2-7 (not shown), a U-shaped spring 150 is located between the flapper and lever 70 and serves to ensure that the end of the flapper is always parallel to the nozzle when it engages the latter. A resilient extention 134 of the feedback lever 78 (Fig. 5) engages a clip 138 which is adjustable to vary the force exerted by the lever on the flapper.
GB34224/65A 1964-08-11 1965-08-10 Bimetallically controlled pneumatic thermostat Expired GB1057799A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US388823A US3302879A (en) 1964-08-11 1964-08-11 Bimetallically controlled pneumatic thermostat

Publications (1)

Publication Number Publication Date
GB1057799A true GB1057799A (en) 1967-02-08

Family

ID=23535665

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34224/65A Expired GB1057799A (en) 1964-08-11 1965-08-10 Bimetallically controlled pneumatic thermostat

Country Status (3)

Country Link
US (1) US3302879A (en)
DE (2) DE1983304U (en)
GB (1) GB1057799A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2189909A (en) * 1986-04-16 1987-11-04 Ti Gas Spares Ltd Gas control valves

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3367573A (en) * 1966-08-11 1968-02-06 Robertshaw Controls Co Miniature pneumatic thermostat
US3908685A (en) * 1973-10-10 1975-09-30 Robertshaw Controls Co Pneumatically operated control device and parts therefor or the like
DE2354864C3 (en) * 1973-11-02 1982-10-14 Eckardt Ag, 7000 Stuttgart Pressure medium-operated display device for measuring or regulating purposes

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US624046A (en) * 1899-05-02 johnson
US680423A (en) * 1898-08-13 1901-08-13 Johnson Electric Service Company Temperature-regulating apparatus.
US2280345A (en) * 1939-03-13 1942-04-21 Honeywell Regulator Co Pneumatic control
US2285540A (en) * 1939-07-01 1942-06-09 Leeds & Northrup Co Control system
US2742917A (en) * 1952-11-15 1956-04-24 Foxboro Co Pneumatically operated controller
US2828077A (en) * 1955-06-29 1958-03-25 Honeywell Regulator Co Pneumatic thermostat

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2189909A (en) * 1986-04-16 1987-11-04 Ti Gas Spares Ltd Gas control valves

Also Published As

Publication number Publication date
DE1523371A1 (en) 1969-04-10
US3302879A (en) 1967-02-07
DE1983304U (en) 1968-04-11

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